7. Patients with pre-existing hepatic impairment: The screening for total bilirubin >1.5 times ULN will be done by the oncologist to qualify for CXRT. The screening for > 2 times the upper limit of normal hepatotoxicity, alkaline phosphatase (ALP) and alanine aminotransferase (ALT) (and aspartate aminotransferase [AST] if it is ordered and available in the medical records) will be done by the oncologist to qualify for CXRT.